fix: 修复Docker构建和路径解析问题

- 在Dockerfile中使用npm中国镜像加速依赖安装
- 修正后端健康检查端点路径
- 修复Docker环境中图片路径解析问题
- 修正前端API地址默认值

docker-compose.yml

@@ -39,7 +39,7 @@ services:
       - rapidocr
       - paddleocr
     healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:13057/api/health"]
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:13057/health"]
       interval: 30s
       timeout: 10s
       retries: 3